Electrically-operated signaling-horn.



E. M. TORMIN.

ELEGTBICALLY OPERATED smmmne HORN.

APPLICATION FILED JULY 6. 1909.

Patented Nov. 22, 1910.

3 SHEETS-SHEET l.

B. m. Tommi ELECTBICALLY OPERATED SIGNALING HORN.

APPLICATION FILED JULY 6, 1909. 976,159, Patented Nov. 22, 1910.

3 SHEETS-SHEET 2.

i I 1 t}: 0 i q k x 6 33 C) (J O O Q I B. M. TORMIN.

ELEGTRIGALLY OPERATED SIGNALING HORN.

APPLICATION FILED JULY 6, 1909.

Patented Nov. 22, 1910.

3 BHEBTS-SHEET 3.

F'i -E- WITH QM Q05 UNITED STATES PATENT OFFICE.

EGMONT MAX TORMIN. OF NEVTON. MASSACHUSETTS. ASSIGNOR TO HOL'I'ZER-CABOT ELECTRIC COMPANY, 013' BRCOKLINE, MASSACHUSETTS. A CORPORATION OF MASSA- CEUSETTS.

ELECTRICALLYOPERATED SIGNALING-HORN.

Specification of Letters Patent.

Patented Nov. 22-, 1910.

To all whom it may concern: v

Be it. known that I, lionox'r M. 1111:1113. a subject of the Emperor of German and a resident of Newton. in the county of Middlesex and State of .\lasszu-husetts, have invented a new and useful improvement in Electrically Operated Signaling Horns, of which the following, is a specification.

My invention relates to eler:trically-m erated signaling-horns for use on boats. motor vehitues, in factories. etc, and its objectis to improve and simplif the construction of such horns in the manner hereinafter set forth whereby the horn is rendered c'utiipact, water-tight. and tlllfilPluUf. and viipable of ready adjusuncnt.

The drawings which accompany and form apart of this specification illustrate the preferred embodiment of my invention.

In the drawings Figure 1 is a longitudi nal section of in improved electric hot-11.2

the section line being shown at l.-1. Fig". i. Fig. :2 is a plan view of said electric h rn. Fig. 3 is a plan \icw of the top at the magnet. frame. Fig. 4- is a scction on tlw line 4- of Fig. 3. Fig. 5 is a plan view In the preferred construction mean should l)t3 clllpluyt'il 'l ul' :itljit 'l'. llit' magnct-franie U with rcspcvl htln' ll: ime-n1 T. and for tlns purpose i may prowl-- tlic inner surface of 2ll=l cas ng with two uppositely arranged flanges S, each provided with a threaded hole ll adapted to receive the si'tcw i which pa s through un'threadcd holes in the top oi' the magn tt'i aiue. and each tlzihift' arrang d to supp-"r2 the ends of uni ut' the two pairs of lt"-(llllj s rews l3. 1 3. whi h arc threaded through E the top of said nizzg'nct-t'ramv.

of the magnet casing ith the magnet frame 3 removed. Fig. 3 is a section of the "Rxlll: 5 taken on the line (3t3 of Fig. 5 showing a portion of the magnet frame it tale-n on the section line X X of Fig. 3. Fig. 7 is a section taken on the line T---'( of Fig. 3. I Fig. 8 'lS a diagram showing the circuits 5 that may be employed when the horn is actuated by a source of relatively high voltage. Fig. 9 is a diagram showing the circuits that may be employed when the horn is actuated by a source of relatively low voltage.

In that particular embodiment of my invention selected for illustration and shown in the accompanying drawings, 1 represents a horn of any suitable material, which may be cast iron, when the horn is to be used in factories, or brass or suitable composition when intended for use on vessels or motor vehicles.

The horn may be provided with a base 2 for securing the same to a support. and preferably is provided with a perforated The magnet mil .6. and the windings 121 or 323'. if either oi the lattcr is etnplo \'t.-d. :H' placed within the magnctiranie. th

Q hollow core 13 is inserted and the bottompiece It secured in any suitable manner. as by a screw. to the iu-igncbframc. thcrcbv =curcl v holding the will. or the coil and windings. in position. 7

l7 is a plunger provided win an armature in integral therewith. or clse fastened thereto in any suitable manner. and secured. as by riveting. to the flat spring 19 which is held on the magnetd'ranie by the screw Q0. The spring 19 forming part of the circuit herein described. insulated as shown from the plunger and magnet-frame.

A bridge provided with a longitudinal slot '23 is secured to the bosses 24' by the screws 24 and is insulated from the magnetfraluc. in any suitable manner. The adjustable backtop screw 21 pas es through said bridge and its lower and. which may be capped with iridium horn-all ltl- :t 1;':li!l t a contact piece (1'I H'ttl to the spring 19. Secured to and insulated from the top of the magnet-frame are the binding-post screws 25, 26, to which the leading-in wires A A are connected. A clip 31 is conductivcly connected to the screw 35 and a clip- 30 is conductively connected with the screw 5-36 and one of the screws 24, 27, 28 and 2a are insulating bushings passing through the top of the magncbframe. One terminal of the magnet-coil 16 passes through the bush ing 27 and is connected to the clip 31 and the other terminal of said winding passes through the bushing 28 and is connected to the clip 32 secured to the screw 20.

\Vhen the leads A A are connected with a source of direct current, the magnet is energized and the plunger 17, the outer end of which normally is adjacent to, but notin contact with, the diaphragm 7 is brought sharply in contact with said diaphragm, whereupon the circuit which includes the magnet-coil is broken at the contact between the contact screw 21 and the spring 19, so that the plunger resumes its normal position and the circuit is a ain closed, the sound so produced by the p unger striking the diaphragm being regulated by the adjustable backstop 21 and the adjusting screws 10 and 13 hereinbefore referred to.

In order to prevent sparking at the coin tact. s, when the horn is operated by relatively high voltages, I may connect across said contact the non-inductive resistance 33, which may be, and preferably is, in the from of a winding surrounding the magnet coil 16. The leads B B of this winding pass respectively through the bushings i8 and 29 and are connected at the points 7) and a respectively to the clips and R0.

nhen the apparatus is to be used with relatively low voltages I may connect across the contact at c a winding 33 consisting of two parallel insulated wires terminating at f, g. The leads B B of the winding '3 are connected at b and 6, respectively, and the arrangement operates as a condenser in shunt to the contact 0.

In the diagram shown in F i s. 8 and 9, a and d represent the terminals 0 the magnetcoil circuit shown by the same letters in The casing 5 may be provided with a cover 36 secured thereto by the screws 37 which pass thr ugh lugs in the casing, and the rubber gas at 35 may be interposed between said co' :r and casing. The leads A A pass throu; L the soft rubber bushing 34 arranged betv sen the nuts 38 and 39 which are threaded M0 the end of said casing and form a cond it for said leads, the joint be tween said 0 adult and easing as well as that between t-ll: cover and easing, being tilled with white lead.

.It will readily be apparent that the diaphragm I, gasket 35, and said conduit reu der the casing 5 water-proof, this bemg quite essential hen the apparatus is inttnded for use on lill)l)()t\l' l.

. it will be noted that the magnct-frame St with-its inclosed apparatus constitutes an electrical vibrator which is complete in itself and which may be removed in its entirety from the rest of the apparatus.

I prefer to make the ends of the hollow core conical in shape to get the best results. Inasmuch as the movement of the plunger as a whole is not absolutely vertical. the lower end thereof has a circular or elliptical motion, and hence the lower end of the core is made conical to accommodate this movement. By providing the upper end of said core with a conical opening, and shaping the head of the plunger to conform thereto, 1 am enabled to reduce. the air gap and decrease the reluctance of the magnetic circuit, so that the vibrator will start more easily and operate more efiiciently. By arranging thc upturned end of the magnetframe directly under the outeredge of the armature. 18, the pull on the plunger is rendered more nearly vertical.

\Yhile I have. specifically tltM'lllN l the preferred form of my invention which has given good results-in practice, it will be understood that both the apparatus and circuit arrangements may be subjected to a wide range of variation by those skilled in the art without departing from the spirit of my invention.

I claim:

1. An electrically-operated signaling-horn comprising in combination a horn, a casing secured to tie inner end'thereof, a diaphragm interposed between said horn and easing, an elcctromagnet having a hollow core, a plunger arranged within said core and having one end normally adjacent to, but not in contact with said diaphragm, a resilient supporting-member secured to the other end of said plunger, a circuit including the coil of said electromagnet, and means whereby said circuit may be automatically opened and closed.

2. An electrically-operated signaling-horn comprising in combination a horn, a casing secured to the inner end thereof, :1 diaphragm interposed between said horn and easing, an electromagnet having a hollow core, a plunger arranged within said core and having one end normally adjacent to, but not in contact with said diaphragm, a resilient supporting-membersecured to the other end of said plunger, a circuitincluding the coil of said electromagnet, means whereby said circuit may be automatically opened and closed, and means surrounding said hollow core and connected to said circircuit including the coil of said electromag I net, means whereby said circuit may be ancuit for preventing sparking when said circuit is opened.

23. Au electrically-operatcd signaling-horn comprising in combination a born, a casing secured to the inner cud thereof, a diaphragm interposed between the horn and casing, an elcctromagnet having a hollow core, a plunger arranged within'said core and having one end normally adgacent to, but not in contact with said diaphragm, a

resilient supporting-member secured to the other end of said plunger, a circuit includmg the coil of said elcctromagnet, means whereby said circuit may be automatically opened and closed, and a non-iuductivc re sistance consisting of a winding surrounding said hollow core and connected to said circuit for preventing sparking when said circuit is opened.

4. An electrically-operated signaling-horn comprising in combination a horn, a casing secured to the inner 'end thereof, a diaphragm interposed. between said horn and casing, 21 magnet-frame, an electromagnet having a hollow core secured in said frame, a plunger arranged within said core and having one end adjacent to, but not in contact with said diaphragm, a resilientsupporting member secured to the other end of said plunger and to said magnet-frame, a

tomatically o ened and closed, an interior flange on sai casing, and means adjustably securing said magnet-frame to said flange.

5. An electrically-operated signalinghorn comprising in combination a born, a casing secured to the inner end thereof, a diaphragm interposed between said horn and casing. a ma net-frame, an electromagnet having a be low core secured in said frame, a plunger arranged within said core and having one end adjacent to, but not in contact with, said diaphragm, a resilient supporting member secured to the other end of said plunger and to said magnet-frame, a circuit including the coil of said electromagnet, means whereby saidcircuit may be automatically opened and closed, an interior flange on said casing, means adjustably securing said magnet-frame to said flange, and screws threaded to said magnet-frame and bearing against said flange for adjusting the position of said electromagnet and plunger with respect to said diaphragm.

6. An Y electrically-operated signalinghorn comprising in combination a. horn, a casing secured to the inner end thereof, a diaphragm interposed between said horn and casing, an electromagnet having a hot low core, the upper end of said hollow core having a conical opening, a plunger arranged within said core and bring its lower and adjacent to said diaphragm, said plunger having a conical head conforming to the opening in the upper end of said hollow core, a resilient supporting member secured to the upper end of said plunger, a circuitincluding the coil of said clcctromaguct and means whereby said circuit may be automatically opened and clos d.

7. An electrically-opcratcd signalinghorn comprising in combination a born, a casing secured to the inner end thereof, a

diaphragm interposed between said horn and casing. an electromagnet having a hol low core. the upper and lower ends of said hollow core having conical openings, a plunger arranged within said core and having its lower end adjacent to said diaphragm, a resilient supporting member secured to the upper end of said plunger, a circuit including the coil of said electromagnet, and means whereby said circuit may be automatically opened and closed.

8. An electrically-operated signalinghorn comprising in combination a horn, a casing secured to the inner end thereof, a diaphragm interposed between said horn and easing, an clectromagnet having a hollow core, the upper and lower ends of said hollow core having Cul'llCfil openings, a plunger arranged within said core and having its lower end adjacent to said diaphragm, said plunger having a conical head conforming to the opening in the upper end of said bolt-- low core, a resilient supporting member secured to the upper end of said plunger, a circuit including the coil of said electromagnet and means whereby said circuit may be automatically opened and closed.

9. An electrically-operated signalinghorn comprising in combination a horn, a casing secured to the inner end thereof, a diaphragm interposed between said horn and casing, an electromagnet having a hollow core, a magnet frame for said electromagnet having an upturned end, said magnet frame forming part of the magnetic circuit of said electromagnet a plunger arranged within said core and having its lower end adjacent to' said diaphragm, a resilient supporting member secured to the upper end of said plunger, an armature secured to said plunger and having its outer edge arranged directly over said upturned end of said magnet frame, a circuit including the coil of said electromagnet, and means whereb said circuit may be automatically opene and closed.

10. An electrically-operated signal nghorn com rising in combination a born, a casing secured to the inner end thereof, a diaphragm interposed between said horn and easing, an electromagnet having a hollow core, a magnet frame for said electronmgnei having an npturnqd end, said mag- 1 means whereby said circuit may be auto- 10 110i framif u-ling part of the magnetic cirruil nf will uh-clrmnaglwi a plunger arrangnd within snixi cm'u and having its lower uni :uljzu-nnt in said diaphragm, an armaimc own-mi 1n xiii! plunger and liming its unmmlgc :n'mngmi directly over said upturned cml nf Eiliil magnet frame, a circuit including the coil of said clectromagnet and maticnlly ogened and clnsml.

In testimony whercofl'l have hereunto subscribed my name this 1st day of July 1909.

EGMOX'L MAX TORMIX.

"Witnesses GEO. K. 'oomvon'm, E. B. Tomuxsox. 

